diff --git a/tests/app/ui/button/button-tests.ts b/tests/app/ui/button/button-tests.ts
index e68355df0..910953396 100644
--- a/tests/app/ui/button/button-tests.ts
+++ b/tests/app/ui/button/button-tests.ts
@@ -78,7 +78,7 @@ var _createButtonFunc = function (): buttonModule.Button {
     // >>button-create
     var button = new buttonModule.Button();
     // << button-create
-    button.text = "Button";  
+    button.text = "Button";
     return button;
 }
 
@@ -372,3 +372,21 @@ export function test_IntegrationTest_Transform_Decoration_Spacing_WithFormattedT
         TKUnit.assertEqual(view.style.letterSpacing, 1, "LetterSpacing");
     });
 }
+
+// Reported in https://github.com/NativeScript/NativeScript/issues/4109
+export function test_setting_formattedText_With_UnknownFont_DoesNotCrash() {
+    let btn = new buttonModule.Button();
+    btn.style.fontFamily = "_UnknownFont";
+
+    helper.buildUIAndRunTest(btn, function (views) {
+        TKUnit.waitUntilReady(() => { return btn.isLayoutValid; });
+
+        let span = new spanModule.Span();
+        span.text = "Login";
+        let formattedString = new formattedStringModule.FormattedString();
+        formattedString.spans.push(span);
+        btn.formattedText = formattedString;
+
+        TKUnit.waitUntilReady(() => { return btn.isLayoutValid; });
+    });
+}
diff --git a/tests/package.json b/tests/package.json
index 2e172bc7d..7057c271c 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -6,10 +6,10 @@
   "nativescript": {
     "id": "org.nativescript.tests",
     "tns-ios": {
-      "version": "2.5.0"
+      "version": "3.0.0"
     },
     "tns-android": {
-      "version": "2.5.0"
+      "version": "3.0.0"
     }
   },
   "dependencies": {
diff --git a/tns-core-modules/ui/text-base/text-base.android.ts b/tns-core-modules/ui/text-base/text-base.android.ts
index fbe646601..05a0ffa15 100644
--- a/tns-core-modules/ui/text-base/text-base.android.ts
+++ b/tns-core-modules/ui/text-base/text-base.android.ts
@@ -320,7 +320,8 @@ function setSpanModifiers(ssb: android.text.SpannableStringBuilder, span: Span,
     const fontFamily = span.fontFamily;
     if (fontFamily) {
         const font = new Font(fontFamily, 0, (italic) ? "italic" : "normal", (bold) ? "bold" : "normal");
-        const typefaceSpan: android.text.style.TypefaceSpan = new org.nativescript.widgets.CustomTypefaceSpan(fontFamily, font.getAndroidTypeface());
+        const typeface = font.getAndroidTypeface() || android.graphics.Typeface.create(fontFamily, 0);
+        const typefaceSpan: android.text.style.TypefaceSpan = new org.nativescript.widgets.CustomTypefaceSpan(fontFamily, typeface);
         ssb.setSpan(typefaceSpan, start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
     }